Idaho Admin. Code r. 58.01.01.556

Current through September 2, 2024
Section 58.01.01.556 - CRITERIA FOR DECLARING AIR QUALITY EPISODES

An air quality episode will be declared by the Department when pollutant concentrations reach, or are forecasted to reach, and persist, at or above the levels listed below. Pollutant concentrations will be determined by the Department through its analysis of meteorological and ambient air quality monitoring data.

Pollutant

Averaging Period

Advisorya

Alert

Warning

Emergencyb

CO

8 hour

NA

15 ppm

30 ppm

40 ppm

NO2

1 hour

NA

0.6 ppm

1.2 ppm

1.6 ppm

24 hour

NA

0.15 ppm

0.3 ppm

0.4 ppm

O3

1 hour

NA

0.2 ppm

0.4 ppm

0.5 ppm

SO2

24 hour

NA

0.3 ppm

0.6 ppm

0.8 ppm

PM2.5

1 hour

80 pg/m3

NA

NA

NA

24 hour

50 pg/m3

NA

NA

NA

PM10

1 hour

385 pg/m3

NA

NA

NA

24 hour

150 pg/m3

350 pg/m3

420 pg/m3

500 pg/m3

Table Footnotes

a. The Department may call an Advisory, if it determines, after evaluating the pertinent meteorology, weather conditions and air quality conditions such as visibility, and source parameters such as source type, strength, location and projected duration, that an Advisory is required to protect the public health.

b. The Department will only declare an emergency with specific concurrence of Governor.

Idaho Admin. Code r. 58.01.01.556

Effective March 28, 2023